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Design and principle of operation
Table 3-3: Fail-open version
Piston diameter
Actuator area
No. of springs
Control pressure
Nominal range
Travel
Thrust
Table 3-4: Materials
Component
Housing and cover
Actuator stem
Piston
Dome (visual indicator)
Bearing
Springs
Seals
For Ø150 piston
1)
3-4
mm
63
in
2.48
cm²
31
in²
4.8
1
bar
6
psi
87
bar
2.3 to 3.7
psi
33 to 54
mm
in
N
680
lbf
153
90
3.54
63
9.8
1
2
4
6
58
87
1.0 to 1.9
14.5 to 28
15
0.59
1320
2580
297
580
Material
Stainless steel 1.4409 · A351 CF3M
Stainless steel 1.4404 · A182 F316L
Glass-fiber-reinforced polyamide
Stainless steel 1.4409 · A351 CF3M
Polycarbonate
Polymer
Spring steel
NBR
150
5.91
176
27.3
3
3
4
6
58
87
1.0 to 2.3
14.5 to 33
2990
6500
672
1461
1)
EB 8315 EN
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